Novel Reactivity of N-Bridged Diiron Phthalocyanine in the Activation of CH Bonds: Hydroacylation of Olefins as an Example of the Efficient Formation of CC Bonds
作者:Leonardo X. Alvarez、Evgeny V. Kudrik、Alexander B. Sorokin
DOI:10.1002/chem.201100650
日期:2011.8.16
Bridge over troubled iron: An N‐bridged diiron tetra‐tert‐butylphthalocyanine complex, usually employed for oxidation reactions, also catalyzes the addition of acetaldehyde to olefins (see scheme) to provide methylketones with a high selectivity (up to 92 %) and high turnover numbers (3600–5700).
Allylic Oxidations Catalyzed by Dirhodium Catalysts under Aqueous Conditions
申请人:Doyle Michael P.
公开号:US20090093638A1
公开(公告)日:2009-04-09
The present invention relates to compositions and methods for achieving the efficient allylic oxidation of organic molecules, especially olefins and steroids, under aqueous conditions. The invention concerns the use of dirhodium (II,II) “paddlewheel complexes, and in particular, dirhodium carboximate and tert-butyl hydroperoxide as catalysts for the reaction. The use of aqueous conditions is particularly advantageous in the allylic oxidation of 7-keto steroids, which could not be effectively oxidized using anhydrous methods, and in extending allylic oxidation to enamides and enol ethers.
Diastereoselective epoxidation of olefins by organo sulfonic peracids, II
作者:R. Kluge、M. Schulz、S. Liebsch
DOI:10.1016/0040-4020(95)01128-5
日期:1996.2
have investigated the behaviour of sulfonic peracids 2in situ generated towards olefins 7a,7b,9,11,14,16,18, allylic and homoallylic alcohols 20,22,24,26,28,30,33 and α,β-unsaturated ketones 35,37,39. Generally, the epoxidation proceeds in a peracid-like manner with greater diastereoselectivity than those by common oxidants. In particular, the epoxidation of Δ4 3-ketosteroids 39a-i led to 4α,5α-epoxides
Organometallic oxide clusters [(Rhcp′)4V6O19] (cp′ = η5-C5Me5) and [(Rhcp′)Cl(CH3CN)2]2[Mo6O19] catalyze the oxidation of cyclohexene with t-butylhydroperoxide to give allylic oxidation products mainly and epoxycyclohexane selectively, respectively.
Structurally related to MOF‐5, the cobalt(II)‐containing metal–organicframework MFU‐1 is stable to hydrolysis. Catalytic turnover is achieved in oxidation reactions with redox‐active MFU‐1, and the solid catalyst is easily recovered from the reaction mixture. Catalytic transformations have been shown to occur inside the pores of the microporous solid.